使用来自powershell的wpf

我开始玩PowerShell了 . 目前我正在尝试加载一个显示WPF窗口的C＃类，所以非常好 . 放置在窗口中的TextBlock绑定到类中的Property . （我已经在CmdLine应用程序中测试了绑定并且它工作正常）...但是当我使用add-tape从powershell加载类时，绑定将不起作用 .

我究竟做错了什么？

$a =@"
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

public class TestClass : INotifyPropertyChanged
    {
        private bool _showed = false;
        private String _myString;

        public String MyString
        {
            get { return _myString; }
            set
            {
                _myString = value;
                if (!_showed)
                    ThreadStuff();
                OnPropertyChanged("MyString");
            }
        }

        public TestClass()
        {
        }

        public TestClass(String value)
        {
            _myString = value;
        }

        private void ThreadStuff()
        {
            _showed = true;
            var thread = new Thread(new ThreadStart(() =>
            {
                CreateWindow();
                System.Windows.Threading.Dispatcher.Run();
            }))
            {
                IsBackground = true
            };
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
        }

        private void CreateWindow()
        {
            var w = new Window();
            var g = new Grid();
            g.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
            g.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
            g.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            g.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });

            for (int i = 0; i < g.RowDefinitions.Count; i++)
            {
                for (int j = 0; j < g.ColumnDefinitions.Count; j++)
                {
                    var b = new Button { Content = new TextBlock { Text = i.ToString() } };
                    Grid.SetRow(b, i);
                    Grid.SetColumn(b, j);
                    g.Children.Add(b);
                }
            }

            var t = new TextBlock();
            var binding = new Binding { Source = MyString, Mode = BindingMode.OneWay };
            t.SetBinding(TextBlock.TextProperty, binding);

            (g.Children[g.Children.Count - 1] as Button).Content = t;

            w.Content = g;
            w.Show();
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            if (handler != null)
                handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
"@

Add-Type -TypeDefinition $a -ReferencedAssemblies presentationcore, presentationframework, windowsbase, "System.Xaml"

$test = New-Object TestClass
$test.MyString = 'hi from powershell'

顺便说一句 . 我第一次使用PowerShell（直到现在我才使用C＃） . 最后，我的目标是将Xaml文件作为视图加载，将C＃文件作为视图模式加载，将它们放在一起并从powershell设置vm的属性（是的，它完全是愚蠢的，写起来更容易WPF申请...但我这样做...现在学校一天^^）